Jasper CountyPower Outage History
What this grade means
Bottom 20% least reliable nationally — frequent and/or long outages. This county ranks in the least reliable fifth of all US counties in our dataset: some combination of frequent outages, long restoration times, or customers affected puts it near the bottom nationally. Backup power is worth prioritizing here rather than treating it as optional.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Aug 10, 2020 | 212 hrs | 14,954 (79%) | Thunderstorm Wind |
| May 21, 2024 | 17 hrs | 7,059 (37%) | Drought |
| Dec 16, 2021 | 53 hrs | 6,920 (37%) | High Wind |
| May 24, 2024 | 32 hrs | 4,736 (25%) | Drought |
| Jun 15, 2016 | <1 hr | 4,494 (24%) | Unnamed event |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Jasper County, Iowa that day.
Over the 12 years from 2014 to 2025, Jasper County recorded 421 distinct power outage events, averaging 3.0 hours per event.
The single worst outage on record in Jasper County started August 10, 2020 (Thunderstorm Wind), lasting 212 hours and leaving up to 14,954 customers without power (79% of the county) at its peak.
July has historically been the worst month for outages in Jasper County, with 59 events recorded during that month across the dataset.
Based on this history, Jasper County earns a Reliability Grade of F, placing it in the 14th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Iowa
Counties with the closest reliability grade and national percentile to Jasper County.
| County | Grade | National percentile |
|---|---|---|
| Poweshiek County | F | 15th |
| Linn County | F | 16th |
| Tama County | F | 12th |
| Benton County | F | 18th |
| Greene County | D | 20th |
Most reliable counties nationally
The top 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | South Dakota | A | 100th |
| Clearwater County | Minnesota | A | 99th |
| Limestone County | Alabama | A | 99th |
Least reliable counties nationally
The bottom 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | West Virginia | F | 0th |
| Lincoln County | West Virginia | F | 0th |
| Cameron Parish | Louisiana | F | 0th |
FAQ
How often does power go out in Jasper County?
Between 2014 and 2025, Jasper County recorded 421 outage events, averaging 3.0 hours each.
What is Jasper County's reliability grade?
Jasper County has a Reliability Grade of F, in the 14th national percentile.
What was the worst power outage in Jasper County?
The worst outage on record started August 10, 2020 (Thunderstorm Wind), lasting 212 hours and affecting up to 14,954 customers.